command creating certificates repeats

openstack-manuals/doc/src/docbkx/openstack-compute-admin/computeconfigure.xml:
  <section xml:id="creating-certifications">
      <title>Creating Certificates</title>
      <para>You can create certificates contained within pem
        files using these nova client
        commands, ensuring you have set up your environment variables for the nova client:
        <screen><prompt>#</prompt> <userinput>nova x509-get-root-cert</userinput>
        <prompt>#</prompt> <userinput>nova x509-create-cert </userinput></screen>
      </para>
     </section>